What is the Benefit of Using Two 6V Batteries and One 12V Battery

Question:

What do you get out of connecting 2 6 volts batteries and a 12 volt battery together. What are the beneifits out of it? Thanks in advance

asked by: Robert

Helpful Expert Reply:

The benefit of using 2 batteries rated for 6V along with 1 battery rated for 12V is that you are using less space (and less weight per battery when moving them) to get the same amount of power and amp hours that you would get if you were to use 3 batteries rated for 12V.

The typical amp/hour rating for a 6V battery is 200. When you connect these in series so that they are compatible with the 12V battery (and your trailer electrical needs) that means you have 2 batteries connected for 200 amp/hours at 12V. When you connect these in parallel with the 12V battery rated for 100 amp/hours this actually increases your amp/hours to 300 with the whole battery system staying at that 12V power level (see attached photo).

expert reply by: Jon G